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针对钛合金铸件具有缩松、锁孔、气孔和晶粒粗大等缺陷的问题，基于电脉冲处理的显著优势，开展了铸造Ti-6Al-4V合金的电脉冲热处理实验，探索了电流密度、电流频率及通电时间等工艺参数对铸造Ti-6Al-4V合金的微观结构和力学性能的影响规律。实验结果表明，电脉冲处理在热效应与非热效应的耦合作用下能够在较低的温度下、极短时间内完成铸造Ti-6Al-4V合金的微观结构调控，细化铸造Ti-6Al-4V合金的晶粒，将等轴组织转化为双态组织或网篮组织。与未经电脉冲处理的铸造Ti-6Al-4V合金相比，工件材料的抗拉强度和屈服强度有所提高，伸长率增加了14.61%,有效改善了铸造Ti-6Al-4V合金的综合力学性能。
Abstract：Aiming at the problems of defects such as shrinkage porosity, lock holes, gas holes and coarse grains in the titanium alloy castings, electric pulse treatment experiment of casted Ti-6Al-4V titanium alloy was carried out based on significant advantages of electric pulse treatment. The evolution laws of process parameters such as current density, current frequency and power-on time on microstructure and mechanical properties of the casted Ti-6Al-4V alloy were explored. The experimental results show that under the coupling effect of thermal effects and non-thermal effects, the electric pulse treatment can complete the regulation and control of microstructure of the casted Ti-6Al-4V alloy at a relatively low temperature and in an extremely short time, and the grains of the casted Ti-6Al-4V titanium alloy were refined, transforming from equiaxed structures to bimodal structures or basket-weave structures. Compared with the casted Ti-6Al-4V alloy without the electric pulse treatment, the tensile strength and yield strength of workpiece material are increased, the elongation is increased by 14.61%, and the comprehensive mechanical properties of the casted Ti-6Al-4V alloy are effectively improved.
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基本信息:
中图分类号:TG146.23
引用信息:
[1]夏源渊,李春玲,陈虎,等.电脉冲处理对铸造Ti-6Al-4V合金微观结构和力学性能的影响[J].塑性工程学报,2025,32(11):189-197.
基金信息:
国家自然科学基金面上项目(52471055); 江西省杰出青年基金资助项目(20224ACB218002); 江西省高层次高技能领军人才培养工程; 江西省教育科学“十三五”规划重点课题(20ZD087); 江西省职业教育教学改革研究省级重点课题(JXJG-24-65-1); 2024年度江西省教育科学规划职业教育核心课程资源研究专项(重点)课题
2025-11-24
2025-11-24
2025-11-24